OEM Equipment
Catalog Data
CA800017EN
Effective July 2015
Supersedes 800-14 August 2012
COOPER POWER
SERIES
600 A – 1400 A 1.2 kV class plastic (HTN)
molded tri-clamp secondary bushings
General
Eaton's Cooper Power™ series secondary
bushings are designed for external mounting on
distribution transformers filled with transformer
oil, Envirotemp™ FR3™ fluid, or an approved
equivalent and are available with either spade
or stud connections. They are designed for
use indoors or inside cubicles of fluid-filled
transformers or switchgear.
Internal spade/externally threaded stud secondary
tri-clamp bushings are available with 5/8" and 1"
diameter copper studs. An internally threaded stud
option is also available. The 5/8" and 1" bushings
come standard with 1 3/4" of usable external
threads. The 1" bushing is also available with up
to 3" externally usable thread lengths. Industry
standard mounting configuration and compatibility
with most available connectors allow use in a wide
range of applications.
These secondary bushings are molded with
Zytel® high temperature nylon (HTN). The Zytel®
HTN high reliability fulfills the required application
needs for temperature stability, strength,
toughness, low moisture absorption and retention
of viable mechanical and electrical properties in
humid high-temperature environments. The gasket
surfaces provide controlled compression and
containment of the highly resilient Buna-N rubber
gasket.
Installation
Clamping studs must be welded around the 1-7/8"
hole to accommodate the clamp. The gasket is
installed over the bushing shank onto the bushing
gasket surface. The bushing assembly is installed
through the tank hole and is placed over the studs
against the shoulder flange of the bushing. A
plated lockwasher and nut are installed on each
stud and tightened to the recommended torque.
Refer to Service Information S800-16-1 1.2 kV
Class Secondary Bushing Installation Instructions
for details.
Catalog Data CA800017EN
600 A - 1400 A 1.2 kV class plastic (HTN) molded tri-clamp
secondary bushings
Effective July 2015
5/8-11 UNC – 2A
MOUNTING
SURFACE
Ø.44"
(11 mm)
THREAD
1.44"
(36.6 mm) FLAT
120°
Ø 1.50"
1.11"
(28.2 mm) (38.1 mm)
.46"
(11.7 mm)
.68"
(17 mm)
.58"
(14.7 mm)
3.10"
(78.7 mm)
“B”
MINIMUM
USABLE
THREAD
Ø 1.75"
(44.5 mm)
GASKET SURFACE
1.30"
(33 mm)
.77"
(19 mm)
Ø 3.376"
BOLT
CIRCLE
(85.75 mm)
2.05"
(52.1 mm)
“A” REF
Catalog
Number
2690286D
Stud/Spade
06
Copper
Std. Thd. Lg
23
Copper
Ext. Thd. Lg
“A”
6.90"
7.34"
(175 mm)
(186 mm)
“B”
1.75"
2.19"
(44.5 mm)
(55.6 mm)
Figure 1. 5/8" – 11 spade internal – copper (with 1.75" usable external thread).
NNote: Dimensions given are for reference only.
MOUNTING SURFACE
1.45"
(36.8 mm)
USABLE THREAD
.46"
(11.7 mm)
120°
Ø 1.75"
(44.5 mm)
.58"
(14.7 mm)
Ø 3.376"
BOLT
CIRCLE
(85.75 mm)
Ø 1.50"
(38.1 mm)
5/8-11 UNC – 2A
.77"
(19 mm)
(BOTH ENDS)
1.75"
(44.5 mm)
MINIMUM
USABLE
THREAD
1.30"
(33 mm)
3.10"
(78.7 mm)
GASKET SURFACE
1.65"
(41.9 mm)
6.50" REF
(165 mm)
Catalog Number
Figure 2. 5/8" – 11 double thread – copper (with 1.75" usable external thread).
NNote: Dimensions given are for reference only.
2
www.eaton.com/cooperpowerseries
2690286D01
Catalog Data CA800017EN
600 A - 1400 A 1.2 kV class plastic (HTN) molded tri-clamp
secondary bushings
Effective July 2015
2.40"
(60.96 mm)
1.61" FLAT
(40.89 mm)
MOUNTING SURFACE
.60"
Ø 1.75"
(15.24 mm) (44.45 mm)
1-14 UNS – 2A THD
“B” MIN.
USABLE THREAD
30° TYP.
1.24"
(31.37 mm)
.58"
(14.73 mm)
2.25"
(57.15 mm)
.77"
(19.4 mm)
.46"
(11.68 mm)
GASKET
SURFACE
120° TYP
“A”
.50"
(12.7 mm)
Ø “H”
.90"
(22.9 mm)
.55"
(13.97 mm)
.67"
(17.02 mm)
Ø 3.376" BOLT CIRCLE
(85.75 mm)
Catalog No.
2690286D
Stud/Spade
07
Copper
Std. Thd. Lg
08
Copper
Ext. Thd. Lg
10
Copper
Std. Thd. Lg
24
Copper
Ext. Thd. Lg
“A”
6.75"
7.25"
6.75"
8.00"
(171.45 mm)
(184.15 mm)
(171.45 mm)
(203.2 mm)
2.10"
2.60"
2.10"
3.05"
(55.34 mm)
(66.04 mm)
(55.34 mm)
(77.47 mm)
Ø .437
Ø .437
Ø .53
Ø .437
(11.10 mm)
(11.10 mm)
(13.46 mm)
(11.10 mm)
“B”
“H”
Figure 3. 1" – 14 spade internal – copper (with 1.75" usable external thread).
NNote: 2.25" usable external thread is optional for 1” – 14 spade internal.
1-14 UNS – 2A THREAD
(BOTH ENDS)
“C”
MOUNTING
SURFACE
120° TYP
30° TYP
Ø 1.75"
(44.45 mm)
.58"
(14.73 mm)
.46"
(11.68 mm)
“B” MIN.
USABLE
THREAD
“D” MIN.
USABLE
THREAD
.77"
(19.4 mm)
“A” REF
.90"
(22.9 mm)
GASKET
SURFACE
.67"
(17.02 mm)
.55"
(13.97 mm)
Ø 3.376" BOLT CIRCLE
(85.75 mm)
Catalog No. 2690286D Stud/Stud
09 Copper Std. Thd. Lg
“A”
6.50"
(165.10 mm)
“B”
2.05"
(52.07 mm)
“C”
2.40"
(60.96 mm)
“D”
2.05"
(52.07 mm)
Figure 3. 1" – 14 double thread – copper (with 1.75" usable external thread).
NNote: Dimensions given are for reference only.
www.eaton.com/cooperpowerseries
3
Catalog Data CA800017EN
600 A - 1400 A 1.2 kV class plastic (HTN) molded tri-clamp
secondary bushings
Effective July 2015
Table 4. Recommended Internal (Oil Side) Connections for 1
Hole Internal Spade
Table 1. Voltage Ratings and Characteristics
Description
kV
Standard Voltage Class
1.2
AC 60 Hz 1 Minute Withstand
10
BIL and Full Wave Crest
30
Nominal Current
Rating
(Amperes)
600
1400
Table 2. Current Ratings and Characteristics
Description
Amperes Continuous
5/8 inch Copper Stud
600 A rms
1 inch Copper Stud
1400 A rms
Current ratings and characteristics are in accordance with ANSI/IEEE Std C57.12.00™-1987 standard.
Ordering information
To order a Secondary Bushing, specify the item desired from
Figures 1 – 4.
Maximum Current
(Amperes)
Number
of Holes
Sides
of Spade
420
1
1
600
1
2
835
1
1
1400
1
2
Notes:
1.Ratings are the maximum current level that can be used with a particular
configuration.
2.Ratings are based on maintaining a bushing temperature rise that is no more than
15 °C above 85 °C top oil temperature (20 °C ambient) when the bushings are
conducting rated current (ANSI/IEEE Std C57.12.00™-1987 standard, Section 5.11).
3.Ratings are based on maintaining a bushing absolute temperature below the level that
would damage the insulation system or seal integrity (with top oil temperature in the
range of 113 – 114 °C absolute) when the bushing is conducting 150% peak load for
24 hours and 191% peak load for 2 hours. (IEEE Std C57.92™-1981 standard, Table 3
{d}).
(All temperature references are in degrees Celsius.)
Table 3. Secondary Bushings
Catalog
Number
Figure
Description
2
5/8 inch-11 w/1.75 inch External Threaded Stud and 1.4
inch Internal Threaded Stud, Copper-600 A
2690286D01
1
5/8 inch-11 w/1.75 inch External Threaded Stud and
Internal Spade w/0.44 inch Dia. Hole, Copper-600 A
2690286D06
3
1 inch-14 w/1.75 inch External Threaded Stud and
Internal Spade w/0.44 inch Dia. Hole, Copper-1400 A
2690286D07
3
1 inch-14 w/2.25 inch External Threaded Stud and
Internal Spade w/0.44 inch Dia. Hole, Copper-1400 A
2690286D08
4
1 inch-14 w/1.75 inch External Threaded Stud and
Internal Threaded Stud, Copper-1400 A
2690286D09
3
1 inch-14 w/1.75 inch External Threaded Stud and
Internal Spade w/0.53 inch Dia. Hole, Copper-1400 A
2690286D10
1
5/8 inch-11 w/2.13 inch External Threaded Stud and
Internal Spade w/0.44 inch Dia. Hole, Copper-600 A
2690286D23
3
1 inch-14 w/3.05 inch External Threaded Stud and
Internal Spade w/0.44 inch Dia. Hole, Copper-1400 A
2690286D24
NNote: Gasket part number, 0537980C20, is INCLUDED with bushing.
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Division
2300 Badger Drive
Waukesha, WI 53188
United States
Eaton.com/cooperpowerseries
© 2015 Eaton
All Rights Reserved
Printed in USA
Publication No. CA800017EN
Eaton and Cooper Power are valuable
trademarks of Eaton in the U.S. and other
countries. You are not permitted to use these
trademarks without the prior written consent
of Eaton.
ANSI/IEEE Std C57.12.00™-1987 and IEEE
Std C57.92™-1981 standards are trademarks
of the Institute of Electrical and Electronics
Engineers, Inc., (IEEE). This publication is not
endorsed or approved by the IEEE.
Envirotemp™ and FR3™ are licensed
trademarks of Cargill, Incorporated.
Zytel® is a registered trademark of Dupont.
For Eaton's Cooper Power series tri-clamp
secondary bushing product information
call 1-877-277-4636 or visit:
www.eaton.com/cooperpowerseries.